
2010 Microchip Technology Inc.
DS70138G-page 189
dsPIC30F3014/4013
TABLE 23-23: TYPE B TIMER (TIMER2 AND TIMER4) EXTERNAL CLOCK TIMING REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions: 2.5V to 5.5V
(unless otherwise stated)
Operating temperature
-40°C
TA +85°C for Industrial
-40°C
TA +125°C for Extended
Param
No.
Symbol
Characteristic
Min
Typ
Max
Units
Conditions
TB10
TtxH
TxCK High Time
Synchronous,
no prescaler
0.5 TCY + 20
—
ns
Must also meet
parameter TB15
Synchronous,
with prescaler
10
—
ns
TB11
TtxL
TxCK Low Time
Synchronous,
no prescaler
0.5 TCY + 20
—
ns
Must also meet
parameter TB15
Synchronous,
with prescaler
10
—
ns
TB15
TtxP
TxCK Input Period Synchronous,
no prescaler
TCY + 10
—
ns
N = prescale
value
(1, 8, 64, 256)
Synchronous,
with prescaler
Greater of:
20 ns or
(TCY + 40)/N
TB20
TCKEXTMRL Delay from External TxCK Clock
Edge to Timer Increment
0.5 TCY
—
1.5 TCY
—
Note 1:
Timer2 and Timer4 are Type B.
TABLE 23-24: TYPE C TIMER (TIMER3 AND TIMER5) EXTERNAL CLOCK TIMING REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions: 2.5V to 5.5V
(unless otherwise stated)
Operating temperature
-40°C
TA +85°C for Industrial
-40°C
TA +125°C for Extended
Param
No.
Symbol
Characteristic
Min
Typ
Max
Units
Conditions
TC10
TtxH
TxCK High Time
Synchronous
0.5 TCY + 20
—
ns
Must also meet
parameter TC15
TC11
TtxL
TxCK Low Time
Synchronous
0.5 TCY + 20
—
ns
Must also meet
parameter TC15
TC15
TtxP
TxCK Input Period Synchronous,
no prescaler
TCY + 10
—
ns
N = prescale
value
(1, 8, 64, 256)
Synchronous,
with prescaler
Greater of:
20 ns or
(TCY + 40)/N
TC20
TCKEXTMRL Delay from External TxCK Clock
Edge to Timer Increment
0.5 TCY
—1.5
TCY
—
Note 1:
Timer3 and Timer5 are Type C.